Thread-cutter.



(No Model.)

Patented Apr. 8, I902.

(Application filed. Aug. 5, 1901.)

Wqwassss INVENTOR. f fll jflwZQ/f/QZ/ .-W 351% M4 firm/- Human STaTns ATET @FFICE.

ALBERT D. MARBLE, OF YALE, OKLAHOMA TERRITORY.

TH READ-CUTTER.

SPECIFICATION forming part of Letters Patent No. 696,988, dated April 8, 1902.

Application filed August 5, 1901. Serial No. 70,899. (No model.)

To (blZ whom it may concern:

Be it known that I, ALBERT D. MARBLE, residing at Yale, in the county of Payne and Territory of Oklahoma,have invented certain useful Improvements in Thread-Cutters; and I do hereby declare that the following is a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

This invention relates to a new and novel improvement in thread-cutters.

The object of my invention is to provide a thread-cutter which shall be simple of construction and be readily and easily operated, be cheap and durable,with great adaptability.

In the accompanying drawings I have shown in Figure 1 a face view of a thread-cutter embodying my invention. Fig. 2 is an edge view of my thread-cutter with portions removed. Fig. 8 shows a broken view disclosing the position of the spring, while Fig. at shows a view with portions broken away, disclosing the arrangement of the jaw adjustment.

My invention embodies two similar die stocks or jaws A and B. The jaw B is provided with a slot 0, as is shown in Figs. 2 and 4, the threaded portion 0, and the operating stem or handle D. At the remaining end the die stock or member B is provided with. the curved termination b, which fits into and between the two curved terminations a, forming part of the member A. The members a and b are perforated and are united by means of a pin 4. These united members A and B are provided with a plurality of cutting-jaws (C 5,77 4 6,77 (6 7, (6 8,77 9,) (C 10,7711,77 12, 13, and 14C to embody the varioussized threads and may be extended to include other sizes. The member A is shorter than the member 13 and is provided with the projecting car 15, which extends through the slot 0 within the member B, and is further provided with a termination 17, also adapted to fit into the slot 0, as 'is shown in Fig. A. This portion 17, however, comes at an angle to the cylindrical threaded portion 0 of the member 13, as is more clearly shown in Fig. A.

Working upon the cylindrical threaded portion 0 is a nut 16, provided with suitable openings a, into which a suitable capstan-pin may be inserted to revolve the nut, although the nut is further adapted to be turned by means of an ordinary wrench, as the lower portion is angular, as is shown in Fig. 1.

Now in using these die-stocks the nut 16 is threaded forward upon the screw 0 until the wedge-shaped portion 17 is engaged,when the bolts, rods, or Work to be threaded is placed within the proper opening. The nut 16 is then threaded forward, so that the wedgeshaped portion 17 is engaged to pinch or force the members A and B together inward upon the work to be threaded. The die-stocks are then revolved in proper manner and after the run of threading has been out the nut 16 is again advanced until the proper depth has been reached, which is determined by the position of the projecting ear15,working fully within the seating c, in which position the nut 16 will be at the end of its thread, so that it cannotbe further advanced to operate the two die-stock members A and B, as is shown Fig. 4, or the members A and B may be closed to the desired size and the thread cut complete with one run down. The spring 2, which is secured by means of the screw 3, operates to normally force these members A and B apart, so that the nut 16 normally operates against the tension of this spring 2.

'It will be noticed that the members A and B are approximately wedge-shaped and are thicker near the end having the largest threadopenings 5, than at the united end having the smaller thread-opening 14:.

In the construction of this die-stock a number of the cutting-openings may be given the same size and thread, as certain threads are used more than others, and in my die-stock I prefer to provideaplurality of such threads as are mostly used, so that if one set is broken or worn one of the remaining threads of the same number may be used.

As soon as the nut 16 is carried backward the members fly apart, so that the jaws can be easily removed from the work and cleaned.

As I propose providing the die-stocks with a plurality of cutting-openings of the same size, I may provide the standard V-shaped threads or U shaped and oval threads, so that the various kinds of threads may be cut by means of my die-stock or thread-cutter.

Should the die-stock become pinched, or locked together they may be readily separated after the nut 16 has been removed by striking the projecting car 15, which will throw out the member A. From this it will be noticed that my invention comprises two members which are pivotally connected and are normally forced outward by Virtue of a spring, that one of the members has an extending handle which is threaded at the point where the handle extends from the member and is further provided at the threaded port on O with an opening 0, extending transversely through the same, and that I further provide one of the members with the wedge-shaped termination 17, adapted to fit into'the transverse opening 0, and with the projecting ear 15, extending through said opening a, while a nut 16 is adapted to work upon the threaded portion 0 to engage the wedge-shaped termination 17. By virtue of this adjustment, effected by means of the nut 16 and the wedge-shaped termination 17, a bolt or rod may be threaded in such a manner that the nut or bur will run loose or tight upon the thread. For the sake of convenience the thread-openings will of course be marked, indicating both the size rod and the number of the thread, so that the operator will know exactly what thread he is cutting and by the graduating-scale will know the size he is cutting and whether loose or tight, and,

Having thus described my said invention, what I claim as new, and desire to secure by United States Letters Patent, is

In a thread-cutter of the character described, the combination of two thread-cutting members pivotally connected, a spring to normally force said members apart, a bandle extending from one of said members, said handle being provided with a threaded portion and an opening extending transversely through said threaded portion, said remaining member being provided with a projecting ear adapted to pass through said opening and a wedge-shaped termination adapted to fit into said transverse openings, and a nut upon said threaded portion adapted to engage said wedge-shaped termination, as and for the purpose set forth.

W. A. NORTHGRAVE, J. H. MULLEN, 

